Q161
ReasoningSeating Arrangement, Ranking & Puzzles
In the following series, how many such odd numbers are there which are divisible by 3 or 5, then followed by odd numbers, and then also followed by even numbers?
- a.Zero
- b.One
- c.Two
- d.Three
Answer: (C) Two
Scanning the sequence in overlapping triplets, exactly two starting numbers satisfy all three conditions (odd, divisible by 3 or 5, immediately followed by an odd number, which is in turn immediately followed by an even number): the triplet 3-25-18 and the triplet 21-45-46, giving two qualifying cases.